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Turbocharged engines and the idling start / stop system

What will be the impact on the engine? Are the effects of this immediate shutdown researched by the engine manufacturers?

railfanwithk750 recently shared this with other BHPians.

Many of us have been taught to let our turbo engines idle for a minute after a drive to allow the turbo to spool down gradually. I have been a faithful follower of this practice, and Team-BHP recommends this too.

However, the idle start-stop systems incorporated in today's cars seem to counter this suggestion. The ISS systems are too aggressive and are prepared to turn off the engine at the slightest instance. While this may not be so much of a bother in bumper-to-bumper traffic where usually the turbo never gets to spool, what about an example where you are cruising on a highway and then you reach a toll, you slot in to neutral and - the engine switches off?

What will be the impact on the engine? Are the effects of this immediate shutdown researched by the engine manufacturers? Theoretically, we do have a button to temporarily disable the start-stop system - but it is not ideal. The system resets to "on' every time the car ignition is turned off. There are instances where I would have turned off my ignition and after turning on again, I would have forgotten to disable the auto start/stop. Forget informed users, would the average user even know?

Considering that so many cars are equipped with turbos also come with Idle Start/Stop (a few that quickly come to mind: Ciaz, Ertiga, S-Cross, DZire BS6, Mahindra XUV500, XUV300, TUV300, Hyundai Nios Turbo, and Altroz i-Turbo), should this be a cause for concern and should this call for an alternate solution?

Thanks to railfanwithk750 once again! Check out BHPian comments for more insights & information.

 
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